Feed attachment for lathes.



No. 670,430. Patented Mar. 26', l90l. E. H. MACK. FEED ATTACHMENT FORLATHES.

(Appligakion filed Sept. 12, 1900.

(No Model.)

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UNITED STATES PATENT OEEIoE.

EDWARD H. MACK, OF BETHLEHEM, PENNSYLVANIA.

FEED ATTACHMENT FOR LATHES.

SPECIFICATION forming part of Letters Patent No. 670,430, dated March26, 1901. Application filed September 12, 1900. Serial No. 29,779. (Nomodel.)

To ail whom it may concern:

Be it known that I, EDWARD H. MACK, a citizen of the United States,residing at Bethlehem, in the county of Northampton and State ofPennsylvania, have invented new and useful Improvements in FeedAttachments for Lathes, of which the following is a specification.

This invention relates to new and useful improvements in feedattachments for lathes; and its primary object is to provide a device ofsimple construction which may be readily applied and whereby thecross-feed of the cutting-tool may be automatically operated from theface-plate.

To these ends the invention consists in providing a face-plate with oneor more studs or projections having rollers thereon which are adapted tocontact successively with a lever pivoted to a bracket which is securedto the bed of the lathe. A chain is connected to the opposite end of thelever and extends under a pulley which is journaled upon the bracket.This chain is connected at a point adjacent to its opposite end to anarm of a ratchet which operates a cross-feed of ordinary construction.

The invention also consists in the further novel construction andcombination of parts hereinafter more fully described and claimed, andillustrated in the accompanying drawings, in which- Figure l is a sideelevation of a lathe, showing the attachment applied thereto. Fig. 2 isa front elevation of the attachment, showing' the upper portion of thebracket broken away and the face-plate and lathe in section; and Fig. 3is a similar view of a modified form. V

Referring to the figures by numerals of reference, l is a face-plate, inone or more of the slots 2 of which is secured a stud 3, having a roller4 mounted thereon. These studs are adapted to contact successively withthe end of a lever 5, pivoted within the forked upper end 6 of a bracket7, which is secured to the bed'8 of the lathe. The opposite end of thelever 5 is secured to a chain 9, which is adapted to pass downward andunder a pulley 10, which is journaled upon a stud 11, extending from thebracket 7 at a point below the lever 5. Said chain then extends forwardand engages a hook 12, which is secured to an arm 13 of an ordinarycross-feed ratchet 14. It will thus be seen that as the face-plate 1revolves the lever will be depressedby each roller 4 as the samecontacts therewith, thereby causing the ratchet-arm 13 to swing back andforth. It will be understood that by varying the number of studsand-rollers 3 and 4:, respectively, the speed of the cross-feed may bereadily regulated;

Should it be desired to reverse the movement of the cutting-tool, it isnecessary to employ an attachment such as shown in Fig. 3. In saidfigure I have shown a pulley 15 journaled upon a stud 16, arranged uponthe bracket 7 at a point above lever 5. It will thus be seen that as theface-plate revolves it will'lift the lever, and as the chain passes overtwo pulleys instead of one the movement of the feed will be reversed.

In the foregoing description I have shown the preferred form of myinvention; but I do not limit myself thereto, as I am aware thatmodifications may be made therein without departing from the spirit orsacrificing any of the advantages thereof, and I therefore reserve theright to make all such changes as fairly fall within the scope of myinvention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

l. A feed attachment for lathes comprising a bracket, a pulley journaledthereon, a lever pivoted to the bracket, and a chain extending from saidlever and around the pulley and adapted to be secured to the arm of across-feed ratchet.

2. The combination with a lathe having a face-plate, of a stud securedto the face-plate, a bracket upon the lathe, a lever pivoted thereto andadapted to be contacted and depressed by the stud, a pulley journaledupon the bracket, a cross-feed, a ratchet to said feed, and a chainsecured to the outer end of the lever and extending under the pulley andadapted to be secured to the arm of said ratchet.

3. The combination with a lathe having a face-plate, of a stud upon saidplate, a roller upon the stud, a bracket secured to the lathe, a leverpivoted thereto and'adapted to be contacted and depressed by the roller,a stud ex tending from the bracket, a pulley journaled thereon, across-feed, a ratchet thereto, and a chain secured to the outer end ofthe lever and extending under the pulley and secured to the arm of theratchet.

4. The combination with a lathe having a face-plate, of a stud securedto said face-' plate, a roller upon the stud, a bracket secured to thelathe, a lever pivoted thereto and adapted to be contacted and depressedby the roller, studs upon the bracket, pulleys 1 jonrnaled thereon, across-feed, a ratchet thereto, an arm to the ratchet, and a chainsecured to the outer end of the lever and mounted upon the pulleys, saidchain being [5 secured to the arm of the ratchet.

In testimony whereof I afiix my signature in presence of two witnesses.

EDWARD H. MACK. Witnesses:

EDWIN A. HORN, ALBERT O. MOWBRAY.

